Google, EarthLink, BlackBerry, and Red Hat have joined forces and asked the FTC and the US Department of Justice to address the harm caused by patent trolling. "Our comments today also focus on a worrisome trend: some companies are increasingly transferring patents to trolls - and providing incentives to assert those patents against their competitors. These transfers can raise rivals' costs and undermine patent peace. This trend has been referred to as patent 'privateering': a company sells patents to trolls with the goal of waging asymmetric warfare against its competitors." Big figures: patent trolls cost the US economy $30 billion per year.